Coal Based Steam Activated Carbon is known to find its most common application for gas purification purpose for having many meso & macro pores. It has been made by removing volatiles from coal by carbonization and then activating it with help of steam at temperature of above 1000 degrees Celsius. This activated carbon is also suitable to be used for wastewater & potable water purification plants. It works on adsorption principle by trapping suspended & dissolved impurities so as to deliver pure water. Coal Based Steam Activated Carbon is also suitable to be used in manufacturing of gas masks for providing protection against toxic gases.